High availability

Figure 26 Active-Active redundancyHP 10GbE switch extensions to VRRP

This section describes VRRP enhancements that are implemented in switch software:

Tracking VRRP router priority

The HP 10GbE switch software supports a tracking function that dynamically modifies the priority of a VRRP router, based on its current state. The objective of tracking is to have, whenever possible, the master bidding processes for various virtual routers in a LAN converge on the same switch. Tracking ensures that the selected switch is the one that offers optimal network performance. For tracking to have any effect on virtual router operation, preemption must be enabled.

Switch software can track the attributes listed in the following table: Table 23 VRRP tracking parameters

Parameter

Description

 

 

Number of IP interfaces on the switch that are active (up)

/cfg/l3/vrrp/track/ifs

Helps elect the virtual routers with the most available routes as the master. (An IP interface is considered active when there is at least one active port on the same VLAN.) This parameter influences the VRRP router's priority in virtual interface routers.

Number of active ports on the same VLAN

Helps elect the virtual routers with the most available

/cfg/l3/vrrp/track/ports

ports as the master. This parameter influences the VRRP

 

router's priority in virtual interface routers.

 

 

Number of virtual routers in master mode on the switch

Useful for ensuring that traffic for any particular client/

/cfg/l3/vrrp/track/vrs

server pair is handled by the same switch, increasing

 

routing efficiency. This parameter influences the VRRP

 

router's priority in virtual interface routers.

 

 

Each tracked parameter has a user-configurable weight associated with it. As the count associated with each tracked item increases (or decreases), so does the VRRP router's priority, subject to the weighting associated with each tracked item. If the priority level of a standby is greater than that of the current master, then the standby can assume the role of the master.

See “Configuring the Switch for Tracking” for an example on how to configure the switch for tracking VRRP priority.

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